78402604560 has 80 divisors (see below), whose sum is σ = 277769233536. Its totient is φ = 17920594944.

The previous prime is 78402604537. The next prime is 78402604571. The reversal of 78402604560 is 6540620487.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×78402604560² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23332429 + ... + 23335788.

Almost surely, 2^78402604560 is an apocalyptic number.

78402604560 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

78402604560 is an abundant number, since it is smaller than the sum of its proper divisors (199366628976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78402604560 is a wasteful number, since it uses less digits than its factorization.

78402604560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46668240 (or 46668234 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The spelling of 78402604560 in words is "seventy-eight billion, four hundred two million, six hundred four thousand, five hundred sixty".